IMO, we should not "just accept it." Flawed Theology should be challenged and argued. Elsewise, many, many sincere believers (mostly new believers) will be led down a path dark with pitfalls abounding.........
NOW.....
IF the OSAS'ers wanna change their "mantra" to Once Sanctified, Always Sanctified, then I could force myself to agree. However the oncesavedalwayssaved mantra is even refuted by Jesus Himself, as has been shown in many, many thousands of comments here on CC.
There is just as much scripture to support OSAS as to contradict it. If Christians would take the time to study what the Word really says about salvation, the apparent contradiction would evaporate. There is no contradiction. The problem is the definition of salvation, which is misconstrued by many.
You do not know what sanctification is. It is in fact a gift from God and it is a person, Jesus. 1 Corinthians 1:30.
"But it is from Him that you are in Christ Jesus, who became to us wisdom from God [revealing His plan of salvation], and righteousness [making us acceptable to God], and
sanctification [making us holy and setting us apart for God], and redemption [providing our ransom from the penalty for sin]...."
Now this needs to be worked out in our lives. That is the other aspect of salvation. We are holy, we need to live it. We are sanctified, we need to live it out day by day. We are righteous, we are justified and we are glorified. We need to learn to live in the light of what Jesus has done for us, if we are to be kingdom people.
If it was automatic, there would be no need for the Bible. Every word in the NT is addressed to Christians. We have choices to make and many are careless and lazy. That's why people need to be stirred up. But that is to exhort them to live out what God has made us to be, not to threaten them with damnation if they don't match up to your idea of holiness, or mine for that matter.
If Christians started saying, "Once born again, always born again", it would be more precise. The word salvation has lost its true meaning. It does not mean just going to heaven when you die. It means to be delivered. We need to be delivered from death, from sin, from self, Satan and the world system. That happens the moment we are born again. The Bible is crystal clear on this.
We are born again spiritually. The outworking takes place in the soul. There are two aspects. The first is spiritual knowledge. We need to know in order to grow. Along with this is the salvation of the soul. I don't know why people get so agitated by this statement. It is in God's word. And there is the problem. Many Christians do not know the difference between the initial born again experience and the ongoing salvation of the soul. Some denominations reject the idea of the salvation of soul. I know a Pentecostal pastor who was forced to stop preaching the subject by the Church authorities. He was threatened with loss of his Pastors' credentials. Personally, I would have told them what they could do with their "credentials". It is God who decides who is and who is not a ministry gift to the Church.
So much angst and so much disputation, and all totally unnecessary. If God causes us to be born again, how can we be unborn again? If God puts us into Christ, who can take us out? Is eternal life eternal or not? Is the life of Christ indestructible or not? (Hebrews 7:16)